public class Text {
    public static void main(String[] args) {
        MyTree tree=new MyTree();
        MyTree.TreeNode  root=tree.createTree();
        tree.desplay(root);
        System.out.println();

        tree.prevTree(root);
        System.out.println();
        tree.inTree(root);
        System.out.println();
        tree.postTree(root);
    }

}
